I don't think it's too far fetched to think it. I do however think there is a lack of evidence to state it categorically as fact which plenty do when looking for a stick to beat Adkins with.
There are a number of factors that would have led to the clean slate beyond Adkins was too stupid to see they weren't good enough etc. I'll just list a few.
1. They were all contracted so it was never going to be as easy as not renewing their contract as has been the case for Wilder.
2. Getting them playing in pre-season, bigging them up publicly etc. was likely to improve their marketability.
3. He was a new manager trying to win over the last manager's squad. Telling them they were all surplus wouldn't go down well and he couldn't replace them all until he got rid as the wage bill was already through the roof.
4. Some players had showed promise at times or the jury was still out (McNulty, Freeman, Scougall, Baxter etc.). After another season, we've further evidence that they are not fit for our purposes.
5. Many were injured when they reported for pre-season meaning that NA couldn't wield the axe straight away due to a shortage of fit players in certain positions.
All fair points. And all understandable ones if you're seeking to justify Adkins's actions (which again is entirely reasonable).
True, the situation's a more favourable now one for Wilder to make a clear out. But, even so, Wilder has transfer listed a tranche of players &, in doing so, set down a significant marker. In hindsight, Adkins should have done the very same.
As you suggest in your second sentence, all of our opinions are necessarily subjective on the whole & dependent on how much sympathy we're willing to offer Adkins. My own subjective view is that he was far too soft, unwilling to ruffle feathers, & expecting people (players, fans, whoever) to just come on board with his "positivity revolution" rather than making it happen by taking tough decisions.
Admittedly, there's no evidence as such for these views. And they come out of a jaundiced perspective (brought about experience of just how abysmal Adkins' sides were over the course of a season). But they do at least seem to offer some possible semi-logical explanation of the drift experienced under Adkins, rather than merely excusing him for being so bad or suggesting he wasn't really that bad because of the supposedly impossible circumstances he faced.
Anyway, though willing to bang on & on about Adkins & his failings, I'm far more intrigued by how Wilder's own revolution is likely to pan out. Like you, & pretty much everyone else, I'm delighted with the first steps Chris has taken.